Of the singles released to radio in 2015, which of these is Max Martin's worst?
Ellie Goulding - "Love Me Like You Do"
Taylor Swift - "Style"
Tori Kelly - "Nobody Love"
Adam Lambert - "Ghost Town"
Sage The Gemini f/ Nick Jonas - "Good Thing"
Taylor Swift f/ Kendrick Lamar - "Bad Blood"
The Weeknd - "Can't Feel My Face"
Demi Lovato - "Cool For The Summer"